Method for operating washing machine

ABSTRACT

Disclosed is a method for operating a washing machine. The method includes a rinsing step for rinsing the laundry by supplying water after the rinsing step, the supplying of the circulation water being stopped or executed for only a certain time. Accordingly, the circulation water is not continuously supplied during the rinsing step, thus it is capable of preventing bubbles from being generated caused by continuously supplying the circulation water. Accordingly, it is capable of preventing detergent dregs from remaining on the laundry even after the rinsing step. And, it is capable of preventing large load from being applied to the washing motors due to the bubbles, thereby being capable of enhancing efficiency of the washing motors and preventing a fire due to increase of a temperature.

RELATED APPLICATION

The present disclosure relates to subject matter contained in priority Korean Application No. 10-2007-0090115, filed on Sep. 5, 2007, which is herein expressly incorporated by reference in its entirety.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a method for operating a washing machine.

2. Description of the Related Art

In general, washing machines are roughly classified into a top rod type washing machine having a vertical drum and a drum type washing machine having a horizontal drum.

The top rod type washing machine or the drum type washing machine is provided with a circulation pump for supplying water to a drum by circulating the water stored in a tub. By circulating the water for washing and rinsing processes, it is capable of reducing consumption of the water.

Also, by circulating the water, detergent can be rapidly dissolved in the water and a detergent solution (i.e., a solution fabricated by dissolving the detergent into the water) can be uniformly absorbed into laundry in the washing process, thereby being capable of enhancing washing performance.

However, in the rinsing process, as a result of circulation of the water, it may create a condition easy to generate bubbles due to continuous circulation of the remaining detergent solution even though it can reduce consumption of the water.

Due to the bubbles, the laundry cannot be smoothly rinsed. Accordingly, dregs of the detergent may remain on the laundry even after the rinsing process.

And, if the bubbles are accumulated between the tub and the drum, the bubbles may serve as friction that interrupts rotation of the drum. Accordingly, large load may be applied to a washing motor for rotating the drum, which causes temperature of the washing motor to go up.

If the temperature of the washing motor continuously goes up over a proper temperature, efficiency of the washing motor may be deteriorated. Also, if the temperature of the washing motor continuously goes up until the washing motor is overheated, a fire may occur.

SUMMARY OF THE INVENTION

Therefore, the present invention is directed to providing a method for operating a washing machine which is capable of preventing bubbles from being generated in a rinsing process. And, another object of the present invention is to provide a method for operating a washing machine which is capable of implementing enhanced rinsing performance.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there may be provided a method for operating a washing machine in accordance with the present invention, the method comprising: washing laundry by continuously supplying circulation water; rinsing the laundry by stopping supplying the circulation water or by supplying the circulation water only for a certain time; and finally dehydrating the laundry.

The rinsing step may be executed in order of processes of draining, intermittent dehydrating, main dehydrating, water supplying and rinsing. Here, supply of the circulation water is stopped over entire sections of the rinsing process, preferably.

Alternately, the rinsing step may be executed in order of processes of draining, intermittent dehydrating, main dehydrating, water supplying and rinsing. Here, the circulation water is supplied at a section of the rinsing process, preferably.

Alternately, the rinsing step may be repeated multiple times between the washing step and the final dehydrating step. And, the circulation water may be supplied only at a part of the plurality of rinsing steps that are repeated. And, the rinsing steps may be executed in order of processes of draining, intermittent dehydrating, main dehydrating, water supplying and rinsing, respectively. Here, the circulation water is supplied over entire sections of the rinsing process, preferably.

Alternately, the rinsing step may be repeated multiple times between the washing step and the final dehydrating step. And, the circulation water may be supplied only a part of the plurality of rinsing steps that are repeated. And, the rinsing steps may be executed in order of processes of draining, intermittent dehydrating, main dehydrating, water supplying and rinsing, respectively. Here, the circulation water is supplied at a section of the rinsing process, preferably.

Alternately, the rinsing step may comprise a first rinsing step, a second rinsing step and a third rinsing step. The first, second and third rinsing steps may be sequentially executed in order of processes of draining, intermittent dehydrating, main dehydrating, water supplying and rinsing, respectively. Here, supply of the circulation water is stopped over entire sections of the rinsing process, preferably.

Alternately, the rinsing step may comprise a first rinsing step, a second rinsing step and a third rinsing step. The first, second and third rinsing steps may be sequentially executed in order of processes of draining, intermittent dehydrating, main dehydrating, water supplying and rinsing, respectively. Here, the circulation water is supplied at a section of the rinsing process, preferably.

Alternately, the rinsing step may comprise a first rinsing step, a second rinsing step and a third rinsing step. The first, second and third rinsing steps may be sequentially executed in order of processes of draining, intermittent dehydrating, main dehydrating, water supplying and rinsing. Here, the circulation water is supplied over entire sections of the rinsing process of any one of the first, second and third rinsing steps, preferably.

Alternately, the rinsing step may comprise a first rinsing step, a second rinsing step and a third rinsing step. The first, second and third rinsing steps may be sequentially executed in order of processes of draining, intermittent dehydrating, main dehydrating, water supplying and rinsing, respectively. Here, the circulation water is supplied at a section of the rinsing process of any one of the first, second and third rinsing steps, preferably.

The foregoing and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate preferred embodiments of the invention and together with the description serve to explain the principles of the invention.

In the drawings:

FIG. 1 is a schematic view showing a drum type washing machine operated by a method for operating a washing machine in accordance with one embodiment of the present invention;

FIG. 2 is a block diagram showing the method for operating a washing machine in accordance with the one embodiment of FIG. 1;

FIG. 3 is a block diagram showing a method for operating a washing machine in accordance with a second embodiment of the present invention;

FIG. 4 is a block diagram showing a method for operating a washing machine in accordance with a third embodiment of the present invention; and

FIG. 5 is a block diagram showing a method for operating a washing machine in accordance with a fourth embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Description will now be given in detail of the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

Hereafter, a method for operating a washing machine in accordance with embodiments of the present invention will be described in detail.

FIG. 1 is a schematic view showing a drum type washing machine operated by a method for operating a washing machine in accordance with one embodiment of the present invention.

Referring to FIG. 1, the drum type washing machine operated by the method for operating a washing machine in accordance with the one embodiment of the present invention includes a cabinet 5 forming an external appearance, a tub 3 installed in the cabinet 5 so as to store water therein, a drum 9 rotatably installed in the tub 3 and receiving laundry therein, washing motors 7, 8 for rotating the drum 9, a rotation shaft 17 for transferring a rotational force from the washing motors 7, 8 to the drum 9, a bearing 11 for supporting the rotation shaft 17, a sealing member 13 for preventing water between the tub 3 and the drum 9 from penetrating into the bearing 11, a detergent supply device 30 for supplying water mixed with detergent to the tub 3, a water supply device 20 configured with a plurality of valves so as to supply or stop supplying water to the detergent supply device 30, a drain pump 40 for draining the water stored in the tub 3 by outwardly pumping it, a circulation pump 50 for circulating the water stored in the tub 3 therein so as to enhance washing and rinsing performance, and a control panel 70 for controlling an overall operation of the washing machine by receiving a manipulation command from a user.

A door 1 is disposed at a front side of the cabinet 5, and a gasket 2 is installed between the door 1 and the tub 3.

A locking spring 4 for supporting the tub 3 is installed between an upper inner surface of the cabinet 5 and an outer upper surface of the tub 3. A friction damper 10 for reducing vibration of the tub 3 is installed between a lower inner surface of the cabinet 5 and an outer lower surface of the tub 3.

A plurality of lifters 9 a for moving the laundry up and down are disposed in the drum 9.

The washing motors 7, 8 consist of a stator 7 implemented as a direct drive type motor and provided with a coil wound at a slot, and a rotor 8 rotating on an outer circumferential surface of the stator 7 and provided with a permanent magnet 12 therein.

The stator 7 is coupled to a rear wall of the tub 3 by a plurality of coupling members 19.

The rotor 8 is coupled to a rear end portion of the rotation shaft 17 by a coupling member 18.

Once the coil of the stator 7 receives a power and thus to become electromagnetic, the rotor 8 is rotated by an interaction between the coil of the stator 7 and the permanent magnet 12 attached into the rotor 8. A rotational force of the rotor 8 is transferred to the drum 9 through the rotation shaft 17.

The bearing 11 is installed in a bearing housing 15 and includes a front bearing positioned at a front side of the rotation shaft 17 and a rear bearing positioned at a rear side of the rotation shaft 17.

The sealing member 13 is insertedly installed on the outer circumference of the rotation shaft 17, thereby preventing water between the tub 3 and the drum 9 from penetrating into the bearing 11.

The detergent supply device 30 serves to mix the supplied water with detergent and then supply it to the tub 3 through a supply pipe 31. One exemplary detergent supply device 30 can be configured as follows. That is, the detergent supply device 30 may include a case and a detergent container installed in the case so as to store various kinds of detergent.

A siphon pipe is formed on a bottom of the detergent container. And, a supply inlet connected to a connection pipe 22 is formed at the upper side of the case, and a detergent outlet connected to a supply pipe 31 is formed on the bottom of the case.

With the configuration mentioned above, the water supplied through the connection pipe 22 is mixed with the detergent stored in the detergent container, and then flows out of the detergent container through the siphon pipe when the water mixed with the detergent reaches a specific level. The water mixed with the detergent is supplied to the tub 3 through the supply pipe 31.

A supply pipe 21 connected to an external water supply source and the connection pipe 22 connected to the detergent supply device 30 are installed at the water supply device 20.

A drain pipe 41 connected to the lower side of the tub 3 and a connection pipe 42 connected to an external drain are respectively installed at the drain pump 40.

A circulation pipe 51 connected to the lower side of the tub 3 and a connection pipe 52 connected to the gasket 2 are respectively installed at the circulation pump 50.

Here, in case that the circulation pump 50 is operated, the drain pump 40 stops operating. But, in case that the drain pump 40 is operated, the circulation pump 50 stops operating.

The control panel 70 is provided with a plurality of buttons and dials allowing the user to manipulate the washing machine, and a displayer for displaying a state of the washing machine.

Hereafter, the method for operating a washing machine in accordance with the one embodiment of the present invention will be described.

FIG. 2 is a block diagram showing the method for operating a washing machine in accordance with the one embodiment of the present invention.

Referring to FIGS. 1 and 2, the method for operating a washing machine in accordance with the one embodiment of the present invention includes washing laundry by continuously supplying circulation water S10, rinsing the laundry after stopping supplying the circulation water S20, and finally dehydrating the laundry S30.

In the washing step S10, the detergent supply device 30 mixes the water supplied from the water supply device 20 with stored detergent and then supplies the water mixed with the detergent to the tub 3 through the supply pipe 31. The circulation pump 50 is then operated so that the water stored at the lower side of the tub 3 may be continuously supplied to the drum 9 through the circulation pipe 51 and the connection pipe 52 during the entire washing step.

And, at the same time, the washing motors 7, 8 rotate the drum 9 in forward or reverse, which causes the laundry to drop or to have reciprocal friction for washing.

The rinsing step S20 is repeated at least once between the washing step S10 and the final dehydrating step S30 so as to enhance the rinsing performance. In this embodiment, since the rinsing step S20 consists of a first rinsing step S21, a second rinsing step S22 and a third rinsing step S23, the same rinsing steps are repeated three times. The rinsing step may be repeated more than three times so as to further enhance the rinsing performance.

The first rinsing step S21, the second rinsing step S22 and the third rinsing step S23 are sequentially executed in order of processes of draining S41, intermittent dehydrating S42, main dehydrating S43, water supplying S44 and rinsing S45, respectively.

The draining process S41 serves to outwardly drain the water stored at the lower side of the tub 3 through the drain pipe 41 and the connection pipe 42.

The intermittent dehydrating process S42 serves to dehydrate the laundry by rotating the drum 9, by the washing motors 7, 8, in forward or reverse with a low speed (350˜400 rpm) before executing the main dehydrating process S43. Through the intermittent dehydrating process S42, the tangled laundry is disentangled. Accordingly, the drum 9 comes to be balanced, thereby preventing vibration and noise from being generated during the dehydrating process.

The main dehydrating process S43 serves to dehydrate the laundry by rotating the drum with a high speed (800˜1200 rpm) after the intermittent dehydrating process S42 is finished.

The water supplying process S44 serves to supply water, by the water supply device 20, to the tub 3 through the supply pipe 31.

The rinsing process S45 serves to rinse the laundry by rotating the drum 9 in forward or reverse resulting from that the washing motors 7, 8 are repeatedly rotated in forward (+) or reverse (−).

In the entire sections of the rinsing step S20 including the first, second and third rinsing steps S21, S22, S23, the circulation pump 50 is switched off. Accordingly, the drum 9 (see FIG. 1) stops receiving the circulation water, thus it is capable of preventing bubbles caused by continuously supplying the circulation water during the first, second and third steps S21, S22, S23.

FIG. 3 is a block diagram showing a method for operating a washing machine in accordance with a second embodiment of the present invention.

Referring to FIGS. 1 and 3, the method for operating a washing machine in accordance with the second embodiment of the present invention includes washing laundry by continuously supplying circulation water S10, rinsing the laundry by supplying the circulation water for a certain time S20, and finally dehydrating the laundry S30.

In the washing step S10, the detergent supply device 30 mixes the water supplied from the water supply device 20 with the stored detergent and then supplies the water mixed with the detergent to the tub 3 through the supply pipe 31. And then, the circulation pump 50 is operated thus to continuously supply the water stored at the lower side of the tub 3 to the drum 9 through the circulation pipe 51 and the connection pipe 52 during the washing step.

At the same time, the washing motors 7, 8 rotate the drum 9 in forward or reverse, which causes the laundry to drop or to have reciprocal friction for washing.

The rinsing step S20 is repeated at least once between the washing step S10 and the final dehydrating step S30 so as to enhance the rinsing performance. In this embodiment, since the rinsing step S20 consists of a first rinsing step S21, a second rinsing step S22 and a third rinsing step S23, the same rinsing steps are repeated three times. The rinsing step may be repeated more than three times so as to further enhance the rinsing performance.

The first rinsing step S21, the second rinsing step S22 and the third rinsing step S23 are sequentially executed. And, processes of draining S41, intermittent dehydrating S42, main dehydrating S43, water supplying S44 and rinsing S45 are sequentially executed within the first rinsing step S21, the second rinsing step S22 and the third rinsing step S23.

The draining process S41 serves to outwardly drain, by the drain pump 40, the water stored at the lower side of the tub 3 through the drain pipe 41 and the connection pipe 42.

The intermittent dehydrating process S42 serves to dehydrate the laundry by rotating the drum 9, by the washing motors 7, 8, in forward or reverse with a low speed (350˜400 rpm) before executing the main dehydrating process S43. Through the intermittent dehydrating process S42, the tangled laundry is disentangled. Accordingly, the drum 9 comes to be balanced, thereby preventing vibration and noise from being generated during the dehydrating process.

The main dehydrating process S43 serves to dehydrate the laundry by rotating the drum 9 with a high speed (800˜1200 rpm) after the intermittent dehydrating process S42 is finished.

The water supplying process S44 serves to supply water, by the water supply device 20, to the tub 3 through the supply pipe 31.

The rinsing process S45 serves to rinse the laundry by rotating the drum 9 in forward or reverse resulting from that the washing motors 7, 8 are repeatedly rotated in forward (+) or reverse (−).

Here, the circulation pump 50 is switched on at a section of the rinsing process S45 thus to supply the circulation water to the drum 9.

Accordingly, the circulation water is continuously supplied over entire sections of the rinsing S45, thereby preventing bubbles from being generated.

FIG. 4 is a block diagram showing a method for operating a washing machine in accordance with the third embodiment of the present invention. Referring to FIGS. 1 and 4, the method for operating a washing machine in accordance with the third embodiment includes washing laundry by continuously supplying circulation water S10, finally dehydrating the laundry S30, and rinsing the laundry repeatedly multiple times between the washing step S10 and the final dehydrating step S30, water being supplied at any one time of the multiple times S20.

In the washing step S10, the detergent supply device 30 mixes the water supplied from the water supply device 20 with the stored detergent and then supplies the water mixed with the detergent to the tub 3 through the supply pipe 31. And then, the circulation pump 50 is operated thus to continuously supply the water stored at the lower side of the tub 3 to the drum 9 through the circulation pipe 51 and the connection pipe 52 during the washing step.

At the same time, the washing motors 7, 8 rotate the drum 9 in forward or reverse, which causes the laundry to drop or to have reciprocal friction for washing.

The rinsing step S20 is repeated at least once between the washing step S10 and the final dehydrating step S30 so as to enhance the rinsing performance. In this embodiment, the rinsing step S20 consists of a first rinsing step S21, a second rinsing step S22 and a third rinsing step S23, and the same rinsing steps are repeated three times. The rinsing step may be repeated more than three times so as to further enhance the rinsing performance.

The first rinsing step S21, the second rinsing step S22 and the third rinsing step S23 are sequentially executed. And, processes of draining S41, intermittent dehydrating S42, main dehydrating S43, water supplying S44 and rinsing S45 are sequentially executed within the first rinsing step S21, the second rinsing step S22 and the third rinsing step S23.

The draining process S41 serves to outwardly drain, by the drain pump 40, the water stored at the lower side of the tub 3 through the drain pipe 41 and the connection pipe 42.

The intermittent dehydrating process S42 serves to dehydrate the laundry by rotating the drum 9, by the washing motors 7, 8, in forward or reverse with a low speed (350˜400 rpm) before executing the main dehydrating process S43. Through the intermittent dehydrating process S42, the tangled laundry is disentangled. Accordingly, the drum 9 comes to be balanced, thereby preventing vibration and noise from being generated during the dehydrating process.

The main dehydrating process. S43 serves to dehydrate the laundry by rotating the drum with a high speed (800˜1200 rpm) after the intermittent dehydrating process S42 is finished.

The water supplying process S44 serves to supply water, by the water supply device 20, to the tub 3 through the supply pipe 31.

The rinsing process S45 serves to rinse the laundry by rotating the drum 9 in forward or reverse resulting from that the washing motors 7, 8 are repeatedly rotated in forward (+) or reverse (−).

Here, the circulation pump 50 is switched on only at the first rinsing step S21, more particularly, is operated over entire sections of the rinsing process S45 of the first rinsing step S21, thus to supply the circulation water to the drum 9. The circulation water may be supplied over entire sections of the rinsing process S45 of the second rinsing step S22 or entire sections of the rinsing process S45 of the third rinsing step S23.

Accordingly, it is capable of preventing bubbles from being generated caused by supplying the circulation water at all steps of the first rinsing S21, the second rinsing S22 and the third rinsing S23.

FIG. 5 is a block diagram showing a method for operating a washing machine in accordance with the fourth embodiment of the present invention. Referring to FIGS. 1 and 5, the method for operating a washing machine in accordance with the fourth embodiment includes washing laundry by continuously supplying circulation water S10, finally dehydrating the laundry S30, and rinsing the laundry repeatedly multiple times between the washing step S10 and the final dehydrating step S30, water being supplied at any one time of the multiple times S20. Here, the rinsing step S20 includes processes of draining S41, intermittent dehydrating S42, main dehydrating S43, water supplying S44 and rinsing S45. And, the water is supplied only at any one process of the processes of draining S41, intermittent dehydrating S42, main dehydrating S43, water supplying S44 and rinsing S45.

In the washing step S10, the detergent supply device 30 mixes the water supplied from the water supply device 20 with the stored detergent and then supplies the water mixed with the detergent to the tub 3 through the supply pipe 31. And then, the circulation pump 50 is operated thus to continuously supply the water stored at the lower side of the tub 3 to the drum 9 through the circulation pipe 51 and the connection pipe 52 during the washing step.

At the same time, the washing motors 7, 8 rotate the drum 9 in forward or reverse, which causes the laundry to drop or to have reciprocal friction for washing.

The rinsing step S20 is repeated multiple times between the washing step S10 and the final dehydrating step S30 so as to enhance the rinsing performance. In this embodiment, since the rinsing step S20 consists of a first rinsing step S21, a second rinsing step S22 and a third rinsing step S23, the same rinsing steps are repeated three times. The rinsing step may be repeated more than three times so as to further enhance the rinsing performance.

The first rinsing step S21, the second rinsing step S22 and the third rinsing step S23 are sequentially executed. And, processes of draining S41, intermittent dehydrating S42, main dehydrating S43, water supplying S44 and rinsing S45 are sequentially executed within the first rinsing step S21, the second rinsing step S22 and the third rinsing step S23.

The draining process S41 serves to outwardly drain, by the drain pump 40, the water stored at the lower side of the tub 3 through the drain pipe 41 and the connection pipe 42.

The intermittent dehydrating process S42 serves to dehydrate the laundry by rotating the drum 9, by the washing motors 7, 8, in forward or reverse with a low speed (350˜400 rpm) before executing the main dehydrating process S43. Through the intermittent dehydrating process S42, the tangled laundry is disentangled. Accordingly, the drum 9 comes to be balanced, thereby preventing vibration and noise from being generated during the dehydrating process.

The main dehydrating process S43 serves to dehydrate the laundry by rotating the drum 9 with a high speed (800˜1200 rpm) after the intermittent dehydrating process S42 is finished.

The water supplying process S44 serves to supply water, by the water supply device 20, to the tub 3 through the supply pipe 31.

The rinsing process S45 serves to rinse the laundry by rotating the drum 9 in forward or reverse resulting from that the washing motors 7, 8 are repeatedly rotated in forward (+) or reverse (−).

Here, the circulation pump 50 is switched on only at the first rinsing step S21, more particularly, is operated at a section of the rinsing process S45 of the first rinsing step S21, thus to supply the circulation water to the drum 9. The circulation water may be supplied at a section of the rinsing process S45 of the second rinsing step S22 or a section of the rinsing process S45 of the third rinsing step S23.

Accordingly, it is capable of preventing bubbles from being generated caused by supplying the circulation water at all steps of the first rinsing. S21, the second rinsing S22 and the third rinsing S23.

As aforementioned, the method for operating the washing machine in accordance with the present invention includes the rinsing step for rinsing the laundry by supplying water after the rinsing step. Here, the supplying of the circulation water is stopped or executed for only a certain time.

Since the circulation water is not continuously supplied during the rinsing step, it is capable of preventing bubbles from being generated caused by continuously supplying the circulation water. Accordingly, it is capable of preventing detergent dregs from remaining on the laundry even after the rinsing step. And, it is capable of preventing large load from being applied to the washing motors due to the bubbles, thereby being capable of enhancing efficiency of the washing motors and preventing a fire due to increase of a temperature.

The foregoing embodiments and advantages are merely exemplary and are not to be construed as limiting the present disclosure. The present teachings can be readily applied to other types of apparatuses. This description is intended to be illustrative, and not to limit the scope of the claims. Many alternatives, modifications, and variations will be apparent to those skilled in the art. The features, structures, methods, and other characteristics of the exemplary embodiments described herein may be combined in various ways to obtain additional and/or alternative exemplary embodiments.

As the present inventive features may be embodied in several forms without departing from the characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be construed broadly within its scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalents of such metes and bounds are therefore intended to be embraced by the appended claims. 

1. A method for operating a washing machine, the method comprising: washing laundry by continuously supplying circulation water; rinsing the laundry by stopping supplying the circulation water or by supplying the circulation water only for a certain time; and finally dehydrating the laundry.
 2. The method of claim 1, wherein the rinsing step is executed in order of processes of draining, intermittent dehydrating, main dehydrating, water supplying and rinsing, wherein supply of the circulation water is stopped over entire sections of the rinsing process.
 3. The method of claim 1, wherein the rinsing step is executed in order of processes of draining, intermittent dehydrating, main dehydrating, water supplying and rinsing, wherein the circulation water is supplied at a section of the rinsing process.
 4. The method of claim 1, wherein the rinsing step is repeated multiple times between the washing step and the final dehydrating step, wherein the circulation water may be supplied only at a part of a plurality of rinsing steps that are repeated.
 5. The method of claim 4, wherein the rinsing steps are executed in order of processes of draining, intermittent dehydrating, main dehydrating, water supplying and rinsing, respectively, wherein the circulation water is supplied over entire sections of the rinsing process.
 6. The method of claim 4, wherein the rinsing steps are executed in order of processes of draining, intermittent dehydrating, main dehydrating, water supplying and rinsing, respectively, wherein the circulation water is supplied at a section of the rinsing process.
 7. The method of claim 1, wherein the rinsing step comprises a first rinsing step, a second rinsing step and a third rinsing step that are sequentially executed in order of processes of draining, intermittent dehydrating, main dehydrating, water supplying and rinsing, respectively, wherein supply of the circulation water is stopped over entire sections of the rinsing process.
 8. The method of claim 1, wherein the rinsing step comprises a first rinsing step, a second rinsing step and a third rinsing step that are sequentially executed in order of processes of draining, intermittent dehydrating, main dehydrating, water supplying and rinsing, respectively, wherein the circulation water is supplied at a section of the rinsing process.
 9. The method of claim 1, wherein the rinsing step comprises a first rinsing step, a second rinsing step and a third rinsing step that are sequentially executed in order of processes of draining, intermittent dehydrating, main dehydrating, water supplying and rinsing, wherein the circulation water is supplied over entire sections of the rinsing process of any one of the first, second and third rinsing steps.
 10. The method of claim 1, wherein the rinsing step comprises a first rinsing step, a second rinsing step and a third rinsing step that are sequentially executed in order of processes of draining, intermittent dehydrating, main dehydrating, water supplying and rinsing, respectively, wherein the circulation water is supplied at a section of the rinsing process of any one of the first, second and third rinsing steps. 